166011511111552 has 16 divisors (see below), whose sum is σ = 330726057292800. Its totient is φ = 83005755555712.

The previous prime is 166011511111549. The next prime is 166011511111597. The reversal of 166011511111552 is 255111115110661.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648482465152 + ... + 648482465407.

It is an arithmetic number, because the mean of its divisors is an integer number (20670378580800).

Almost surely, 2^{166011511111552} is an apocalyptic number.

It is an amenable number.

166011511111552 is a deficient number, since it is larger than the sum of its proper divisors (164714546181248).

166011511111552 is an equidigital number, since it uses as much as digits as its factorization.

166011511111552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296964930573 (or 1296964930561 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 37.

The spelling of 166011511111552 in words is "one hundred sixty-six trillion, eleven billion, five hundred eleven million, one hundred eleven thousand, five hundred fifty-two".